Nowadays, analyzing user behavior on search engines is highly regarded. Lots of options in retrieved results in the search engines, makes users to choose. Once the selection is extremely complex, people will think the simplest decision rule, they decided that not to decide and select. Psychologists know this situation the consequence of "choice overload". Bons (2008) believes that choice overload is the ability of process the information by the people to select. In simpler terms, dealing with a lot of information, lead to the negative results.
This study has been done with the goal to identify modulators of Google search engine. The present study is a survey and an applied research. Using stratified random non-relativistic sampling, 72 MS and PhD students of faculty of Psychology and Educational Sciences and Engineering of Ferdowsi University were selected as a sample. The tools used for collecting data were standard questionnaire (maximizing scale by Schwartz et al 2002) and HCI browser.
The results showed that regardless of the personality types (maximizer and satisfier) and only by regarding of the type of search, you cannot say a definitive statement about choice overload theory. Considering two variables of personality and search type, a significant difference between satisfaction of two types personality from the number of retrieved results were observed.This means that maximizers are, in both special and general search, more satisfied from small results than large results (choice overload). But satisfiers, in special search, the number of retrieved results had no effect on the satisfaction of them (the non-occurrence of choice overload).
Also in satisfiers, in general search results, there was a significant difference between satisfaction from the small and large retrieved results. However, according to their personality and serendipity theory, with increasing the retrieved results, not only choice overload did not occur, but satisfaction of them was more. Hence we can the importance of two factors: the type of search and personality as modulators of choice overload. In general both personality types were satisfied with the speed of retrieve of results in Google search engine.